Low-end torque loss with exhaust modifications - Ford Mustang Forum
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post #1 of 20 (permalink) Old 03-11-2008 Thread Starter
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Low-end torque loss with exhaust modifications

Is it worth modifying my exhaust just to lose low end torque? The stock exhaust sounds pretty nice and I wanted to go with a custom straight pipe that my exhaust shop would do for $180. I really don't want to sacrifice low-end since I'm more of a city driver. I love the sound of SLP LM's and straight pipes, but I don't think it's worth it even though I'm going to do UDP's and CAI + Tune soon so I'll get the power back anyways.

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post #2 of 20 (permalink) Old 03-11-2008
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You're not going to lose any noticeable torque down low.


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post #3 of 20 (permalink) Old 03-11-2008 Thread Starter
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Quote:
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You're not going to lose any noticeable torque down low.
I've seen some complaints on other sites, but I'd take what you say seriously since you've had LM's before. I might just be reading the wrong threads, maybe these people have older Mustangs where there actually would be some harm. Is it the variable cam timing that doesn't cause there to be any ill-effects?
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post #4 of 20 (permalink) Old 03-11-2008
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You should be fine... You won't feel any loss.
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post #5 of 20 (permalink) Old 03-11-2008
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Quote:
Originally Posted by J18369 View Post
I've seen some complaints on other sites, but I'd take what you say seriously since you've had LM's before. I might just be reading the wrong threads, maybe these people have older Mustangs where there actually would be some harm. Is it the variable cam timing that doesn't cause there to be any ill-effects?
When you open up the exhaust and add a CAI/tune, you'll actually spread the torque around a little more. There will definitely be more up high with less gained down low. I've not heard of any issues with the exhaust mods causing any damage.

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post #6 of 20 (permalink) Old 03-11-2008
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I ran teh straight pipes that i had made also.No loss in low end when it was stock.However, when i installed the cai & tune, they did have to tweak alittle to accomodate.

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post #7 of 20 (permalink) Old 03-11-2008
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Quote:
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I ran teh straight pipes that i had made also.No loss in low end when it was stock.However, when i installed the cai & tune, they did have to tweak alittle to accomodate.
That makes sense. More air in and more air out.

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post #8 of 20 (permalink) Old 03-11-2008 Thread Starter
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Holy crap.. straight pipes sound awesome. Makes your heart pound at idle and low RPM's and when you give it some juice it makes you (and probably everyone else on the road) crap their pants. It does have a bit of vibration or drone or whatever when going through the parking lot at very low RPM's but I think that's normal.
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post #9 of 20 (permalink) Old 03-11-2008
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It might've been an older one, I did mine and lost a small but noticeable feel down low but it made up for it up top. It didn't lose enough to switch back, but it was noticeable.







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that was also a 5.0 fox right...? S197's are a little bit different of motors.

You will be more amazed with how it sounds than the power issue. You, like many others might actually feel a slight increase in power. Is this just axle backs, or headers back, or what?

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post #11 of 20 (permalink) Old 03-11-2008 Thread Starter
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Yeah, it sounds great. Just annoyed by the slight vibration when low RPM's in a parking lot, but my V6 with true duals did that too.

I'm just smack in the middle of Melbourne, kind of near the community college/king center. Up the road a bit in a little subdivision. I'm looking into getting my own home within a year or so.
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Yup, it's the 5.0 Fox. You S197 guys are better off.







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Quote:
Originally Posted by J18369 View Post
Holy crap.. straight pipes sound awesome. Makes your heart pound at idle and low RPM's and when you give it some juice it makes you (and probably everyone else on the road) crap their pants. It does have a bit of vibration or drone or whatever when going through the parking lot at very low RPM's but I think that's normal.
So what, did you run out and have the pipes made today?

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post #14 of 20 (permalink) Old 03-11-2008 Thread Starter
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Yep. $185 for a set. They mandrel bent some 2.5 then welded in some nice stainless rolled edged 4" tips. If I knew how to weld I could have done it myself for maybe $60, rather have a professional job though.
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Quote:
Originally Posted by J18369 View Post
Yep. $185 for a set. They mandrel bent some 2.5 then welded in some nice stainless rolled edged 4" tips. If I knew how to weld I could have done it myself for maybe $60, rather have a professional job though.
I'm guessing the basic pipe is aluminized steel?


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